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get a grip on

Also, have a grip on. Obtain mastery or control over something or someone. For example, Get a grip on yourself or the reporters will give you a hard time, or, as Arthur Conan Doyle put it in Sherlock Holmes (1894): “I have a grip on the essential facts of the case.” This expression transfers a firm physical hold to emotional or intellectual control. [Late 1800s]

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.